摘要
采用沉积-沉淀法制备Ag/TS-1催化剂,在423 K、常压条件下用于丙烯气相环氧化反应,研究了碱金属沉淀剂KOH的影响。结果表明,以KOH为沉淀剂、TS-1为载体制备的Ag/TS-1催化剂反应性能最佳,丙烯转化率为1.8%,环氧丙烷选择性为91.7%;K+的存在对反应有促进作用。
Gas-phase propylene epoxidation with Ag/TS-1 catalyst prepared by deposition-precipitation method is studied. The effect of precipitator of KOH is investigated at 423 K and ambient pressure. Ag/TS-1 catalyst is characterized by TEM, XRD and UV-Vis. The results show that propylene conversion of 1.8% and PO selectivity of 91.7% are obtained with Ag/TS-I catalyst prepared with 5 × 10 ^-2 mol/L KOH as precipitator. This catalyst shows good stability.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第4期45-48,52,共5页
Modern Chemical Industry
关键词
银
丙烯环氧化
环氧丙烷
沉淀剂
钾
silver
propylene epoxidation
propylene oxide
precipitator
kalium
